介质加载天线阵的瞬态辐射特性

 提高天线增益和辐射效率是瞬态天线研究的重要内容之一。通过设定高斯脉冲激励波形，导出了瞬态辐射的能量阵列因子,分析了1维对称均匀天线阵列的瞬态辐射特性。结果表明:阵列的辐射波形与观察时间区间和角度有关，瞬态与稳态特性差异明显，时域辐射方向图与脉冲宽度有关，阵列可实现时域波束扫描。设计了介质加载天线阵，并采用3维电磁场分析软件进行了时域仿真计算，分析了介质加载对天线辐射特性的影响。研究表明:有介质加载的天线前向辐射电场峰值比没有介质加载的天线增加逾1倍，即瞬态辐射功率增大了3倍多,通过对计算和仿真结果的分析比较，验证了分析和设计方法的正确性和有效性。

Transient radiation characteristic of dielectric loaded antenna array

Increasing gain and radiant efficiency is one of the most important aims of the research on trantrent antenna. The energy array factor of transient radiation was deduced by setting the Gaussian pulse feeding waveform. The transient radiation characteristic of one dimension, symmetrical, and uniform array was analyzed. The radiated waveform of array is correlated with observational time and angle, transient characteristic is quite different from that of transient-free, time domain pattern is correlated with pulse width, and time domain array is scannable. The dielectric loaded antenna array were designed and simulated by using 3D time domain electromagnetic simulation software. The front peak electric field of antenna with dielectric is two times of antenna without dielectric, and the effec